CN208987241U - Expansible graphite piece - Google Patents
Expansible graphite piece Download PDFInfo
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- CN208987241U CN208987241U CN201821413499.9U CN201821413499U CN208987241U CN 208987241 U CN208987241 U CN 208987241U CN 201821413499 U CN201821413499 U CN 201821413499U CN 208987241 U CN208987241 U CN 208987241U
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- graphite
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- flow passage
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- radiating part
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Abstract
The utility model relates to a kind of expansible graphite piece, including graphite substrate, graphite substrate includes multiple radiating parts, multiple flow passages and at least one flexible adjustment portion, and adjacent flow passage is connected by adjustment portion；Radiating part is respectively connected on flow passage and adjustment portion, multiple radiating parts are extended along the length direction of graphite substrate；Graphite substrate is multi-layer compound structure comprising expanded graphite layer, spraying plating the aluminium foil layer of expanded graphite layer surface, spraying plating aluminium foil layer surface boron carbide coating.On the one hand, the adjacent flow passage of the utility model is connected by adjustment portion, since adjustment portion has elasticity, can effectively increase the cushion performance of graphite flake, and graphite flake is made to have the function of that adjusting difference in height and spacing, radiating part then can be improved graphite flake radiating efficiency；On the other hand, the utility model is in the surface of expanded graphite layer successively spraying plating aluminium foil layer and boron carbide coating, so that graphite flake electric conductivity with higher, electromagnetism interference and oxidation stability.
Description
Technical field
The utility model relates to graphite flake technical field more particularly to a kind of expansible graphite pieces.
Background technique
In recent years, with the continuous development of electronic technology, electronic product is kept updating, the size of work package
Smaller and smaller, the speed and efficiency of work are higher and higher, and calorific value is also increasing, therefore do not require nothing more than it and be equipped with accordingly
Radiator is made it is also to be ensured that radiator has stronger heat-sinking capability with guaranteeing the reliability of properties of product and extending it
Use the service life.
Graphite substrate becomes hyundai electronics class product solution because of its distinctive low-density and high heat conduction and heat radiation coefficient and low thermal resistance
The certainly preferred material of heat conduction and heat radiation technology；Wherein, expanded graphite (EG) is by natural graphite scale through intercalation, washing, drying, height
The loose porous vermiform substance of one kind that warm extruding obtains.Expanded graphite is in addition to having the cold-hot of natural graphite itself, resistance to
Other than the excellent performances such as burn into self-lubricating, also there is the unexistent softness of natural graphite, compression resilience, adsorptivity, ecological ring
The characteristics such as border harmony, biocompatibility, radiation resistance.In the actual production process, since expanded graphite is also conductive,
Therefore usually in conductive metal materials such as the one side fitting copper of graphite matrix, aluminium, to enhance its electric conductivity.
However, existing Expandable graphite sheet has the deficiency of following several respects:
1) existing Expandable graphite sheet voidage is higher, these stomatas graphite flake using when be it is very unwelcome,
Because these stomatas can accelerate the consume of graphite flake, this is because entire graphite flake be oxidized as a result, and the oxidation
It is accelerated by stomata, therefore significant the service life for reducing graphite flake；Under high temperature environment, this consumption of graphite flake
Damage is especially apparent, and due to the oxygen in carbon and atmosphere, is reacted in 500 DEG C or higher temperature and it is observed that this consume
Up to the 70% of graphite flake volume, this has detrimental effect to the economy that graphite flake uses, because actually only about
30% graphite flake is utilized effectively.
2) existing Expandable graphite sheet is usually in the simply compound layers of copper in the surface of graphite substrate or aluminium layer, and it is general
It is carried out by the way of bonding compound, causes that electrically conductive graphite piece is also easy to produce graphite laminated and graphite edge has picking etc. bad existing
As to influence the conductive effect of graphite flake.
3) existing electrically conductive graphite piece electromagnetism interference performance is poor, the electromagnetic wave that electronic product releases, and can give surrounding
Other electronic equipments bring electromagnetic interference, make its operation irregularity, while can also cause damages to human health.
4) existing Expandable graphite sheet heat conduction and heat radiation performance needs to be further increased, to meet the use need under hot environment
It asks.
Utility model content
The purpose of this utility model is that: in view of the deficiencies of the prior art, and a kind of expansible graphite piece is provided, to solve
The problem that existing graphite flake heat dissipation performance is bad, electric conductivity is poor, oxidation-stabilized performance is low, electromagnetism interference performance is insufficient.
To achieve the goals above, the utility model uses following technical scheme:
A kind of expansible graphite piece, including graphite substrate, the graphite substrate include multiple radiating parts, multiple flow passages and
At least one flexible adjustment portion, the adjacent flow passage are connected by the adjustment portion；
The radiating part is respectively connected on the flow passage and the adjustment portion, multiple radiating parts are along graphite substrate
Length direction is extended；
The graphite substrate be multi-layer compound structure comprising expanded graphite layer, spraying plating expanded graphite layer surface aluminium
Layers of foil, spraying plating aluminium foil layer surface boron carbide coating.
As the preferred embodiment of expansible graphite piece described in the utility model, the radiating part, the adjustment portion and institute
Flow passage is stated to be an integral molding structure.
As the preferred embodiment of expansible graphite piece described in the utility model, each flow passage is provided with positioning
Hole.
As the preferred embodiment of expansible graphite piece described in the utility model, the adjustment portion includes arcuate segments and two
Bonding pad；Wherein: the arcuate segments are connected between two bonding pads, and the opposite sides of the arcuate segments passes through two
The bonding pad is connect with the adjacent flow passage respectively；Minimum dimension of the arcuate segments on thickness direction, greatly
In full-size of the bonding pad on thickness direction.
As the preferred embodiment of expansible graphite piece described in the utility model, the radiating part is planar structure, and even
The plane being connected to where the radiating part on the arcuate segments, at the radiating part and the arcuate segments intersecting straight lines
Section.
As the preferred embodiment of expansible graphite piece described in the utility model, the arcuate segments are to close to the radiating part
Side protrusion.
As the preferred embodiment of expansible graphite piece described in the utility model, the expanded graphite layer with a thickness of 1~
10mm。
As the preferred embodiment of expansible graphite piece described in the utility model, the aluminium foil layer with a thickness of 0.1~
1mm。
As the preferred embodiment of expansible graphite piece described in the utility model, the boron carbide coating with a thickness of 0.1
~1mm.
Compared with the prior art, the utility model has the beneficial effects that:
1) the adjacent flow passage of the utility model is connected by adjustment portion, since adjustment portion has elasticity, can be effectively increased
The cushion performance of graphite flake makes graphite flake have the function of adjusting difference in height and spacing, to meet the connection requirement of electric equipment；
And the flow passage and adjustment portion of integral multilayer structure, it can guarantee the area meet demand of flow-passing surface, make high current safety.
2) the utility model can improve entire graphite flake and sky by the way that radiating part is arranged on flow passage and adjustment portion in this way
The area of gas contact, and then the radiating efficiency of graphite flake can be improved.
3) the utility model is passed using metallic aluminium layers of foil with high fever by the surface spraying plating aluminium foil layer in expanded graphite layer
It leads and electromagnetic shielding performance, graphite flake heat conduction and heat radiation effect not only can be enhanced, but also in such a way that aluminium foil layer absorbs clutter
To effectively reduce the noise jamming between electronic equipment.And the dense carbon splendid in the antioxidant of the surface of aluminium foil layer spraying plating again
Change boron coating, fusing point is up to 2350 DEG C, so that it is guaranteed that under the conditions of thermal stress is up to about 2000 DEG C boron carbide coating it is airtight
Property, so that the infiltration of oxygen can not occur.And coating complex method is carried out using bonding compared to existing, the utility model uses
Plasma spray coating carries out the compound mode of coating, can substantially reduce the problem of intermediate peeling occurs.Therefore, the utility model is logical
Surface in expanded graphite layer successively spraying plating aluminium foil layer and boron carbide coating are crossed, so that graphite flake electric conductivity with higher, anti-
Electromagnetic disturbance and oxidation stability, to effectively extend the service life of graphite flake.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the structural schematic diagram of graphite substrate in the utility model.
In figure: 1- radiating part；2- flow passage；21- location hole；3- adjustment portion；10- expanded graphite layer；20- aluminium foil layer；30-
Boron carbide coating.
Specific embodiment
To keep the technical solution of the utility model and advantage clearer, below in conjunction with specific embodiment and specification
Attached drawing is described in further detail the utility model and its advantages, but the embodiments of the present invention is not limited to
This.
As shown in Fig. 1~2, a kind of expansible graphite piece, including graphite substrate, graphite substrate includes multiple radiating parts 1, more
A flow passage 2 and at least one flexible adjustment portion 3, adjacent flow passage 2 are connected by adjustment portion 3；Flow passage 2 and tune
Radiating part 1 is respectively connected in section portion 3, multiple radiating parts 1 are extended along the length direction of graphite substrate；Graphite substrate is multilayer
Composite construction comprising expanded graphite layer 10, spraying plating are in the aluminium foil layer 20 on 10 surface of expanded graphite layer, spraying plating in 20 table of aluminium foil layer
The boron carbide coating 30 in face.
Wherein, adjustment portion 3 includes arcuate segments and two bonding pads；Wherein: arcuate segments are connected between two bonding pads, arc
Shape area to close to radiating part 1 side protrude, and the opposite sides of arcuate segments by two bonding pads respectively with adjacent overcurrent
Portion 2 connects；Minimum dimension of the arcuate segments on thickness direction, greater than maximum ruler of the bonding pad on thickness direction
It is very little, to improve the elastic deformability of graphite flake；Radiating part 1 is planar structure, and where the radiating part 1 being connected on arcuate segments
Plane, perpendicular to the section at radiating part 1 and arcuate segments intersecting straight lines.
Wherein, aluminium foil layer 20 and boron carbide coating 30 by the way of plasma spray coating well known in the art successively spraying plating in
The surface of graphite substrate.And coating can be made to be firmly bonded to very much on expanded graphite layer 10 using the method for spraying plating, without
There is the problem of delamination, and guarantees that graphite flake integrally has good conductive property.
On the one hand, the adjacent flow passage 2 of the utility model is connected by adjustment portion 3, can since adjustment portion 3 has elasticity
The cushion performance for effectively increasing graphite flake makes graphite flake have the function of adjusting difference in height and spacing, to meet electric equipment
Connection requirement；And the flow passage 2 and adjustment portion 3 of integral multilayer structure, it can guarantee the area meet demand of flow-passing surface, make high current
Safety.And the utility model can improve entire graphite flake by the way that radiating part 1 is arranged on flow passage 2 and adjustment portion 3 in this way
The area contacted with air, and then the radiating efficiency of graphite flake can be improved.
On the other hand, the utility model utilizes metal aluminum foil by the surface spraying plating aluminium foil layer 20 in expanded graphite layer 10
Layer 20 has high heat transfer and electromagnetic shielding performance, graphite flake heat conduction and heat radiation effect not only can be enhanced, but also pass through aluminium foil layer
20 absorb the mode of clutters to effectively reduce the noise jamming between electronic equipment.And in the spraying plating again of the surface of aluminium foil layer 20
The splendid fine and close boron carbide coating 30 of antioxidant, fusing point are up to 2350 DEG C, so that it is guaranteed that being up to about 2000 DEG C of items in thermal stress
The air-tightness of boron carbide coating 30 under part, so that the infiltration of oxygen can not occur.And coating is carried out using bonding compared to existing
Complex method, the utility model can substantially reduce generation intermediate peeling in such a way that plasma spray coating progress coating is compound
The problem of.Therefore, the utility model is by the surface of expanded graphite layer 10 successively spraying plating aluminium foil layer 20 and boron carbide coating 30,
So that graphite flake electric conductivity with higher, electromagnetism interference and oxidation stability, to effectively extend the use of graphite flake
Service life.
In an embodiment of expansible graphite piece according to the present utility model, radiating part 1, adjustment portion 3 and flow passage 2 are
Integrated formed structure.
In an embodiment of expansible graphite piece according to the present utility model, each flow passage 2 is provided with location hole
21, it is used to be located by connecting with external electric equipment.
In an embodiment of expansible graphite piece according to the present utility model, expanded graphite layer 10 with a thickness of 1~
10mm。
In an embodiment of expansible graphite piece according to the present utility model, aluminium foil layer 20 with a thickness of 0.1~1mm.
If the thickness of aluminium foil layer 20 is too low, it is difficult to effectively improve the electric conductivity and electromagnetism interference performance of graphite flake.
In an embodiment of expansible graphite piece according to the present utility model, boron carbide coating 30 with a thickness of 0.1~
1mm.If the thickness of boron carbide coating 30 is too low, it not can guarantee the surface air-tightness of graphite flake, influence the anti-oxidant of graphite flake
Performance.
According to the disclosure and teachings of the above specification, the utility model those skilled in the art can also be to above-mentioned reality
The mode of applying is changed and is modified.Therefore, the utility model is not limited to above-mentioned specific embodiment, all this field skills
It is practical new that art personnel any conspicuous improvement made on the basis of the utility model, replacement or modification belong to this
The protection scope of type.In addition, these terms are intended merely to facilitate although using some specific terms in this specification
It is bright, any restrictions are not constituted to the utility model.
Claims (9)
1. a kind of expansible graphite piece, it is characterised in that: including graphite substrate, the graphite substrate includes multiple radiating parts, more
A flow passage and at least one flexible adjustment portion, the adjacent flow passage are connected by the adjustment portion；
The radiating part, length of multiple radiating parts along graphite substrate are respectively connected on the flow passage and the adjustment portion
Direction is extended；
The graphite substrate be multi-layer compound structure comprising expanded graphite layer, spraying plating expanded graphite layer surface aluminium foil layer,
Boron carbide coating of the spraying plating in aluminium foil layer surface.
2. expansible graphite piece according to claim 1, it is characterised in that: the radiating part, the adjustment portion and described
Flow passage is an integral molding structure.
3. expansible graphite piece according to claim 1, it is characterised in that: each flow passage is provided with positioning
Hole.
4. expansible graphite piece according to claim 1, it is characterised in that: the adjustment portion includes arcuate segments and two companies
Meet area；Wherein: the arcuate segments are connected between two bonding pads, and the opposite sides of the arcuate segments passes through two institutes
Bonding pad is stated to connect with the adjacent flow passage respectively；Minimum dimension of the arcuate segments on thickness direction, is greater than
Full-size of the bonding pad on thickness direction.
5. expansible graphite piece according to claim 4, it is characterised in that: the radiating part is planar structure, and is connected
Plane where the radiating part on the arcuate segments, at the radiating part and the arcuate segments intersecting straight lines
Section.
6. expansible graphite piece according to claim 4, it is characterised in that: the arcuate segments are to close to the radiating part
Side protrusion.
7. expansible graphite piece according to claim 1, it is characterised in that: the expanded graphite layer with a thickness of 1~
10mm。
8. expansible graphite piece according to claim 1, it is characterised in that: the aluminium foil layer with a thickness of 0.1~1mm.
9. expansible graphite piece according to claim 1, it is characterised in that: the boron carbide coating with a thickness of 0.1~
1mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821413499.9U CN208987241U (en) | 2018-08-30 | 2018-08-30 | Expansible graphite piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821413499.9U CN208987241U (en) | 2018-08-30 | 2018-08-30 | Expansible graphite piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208987241U true CN208987241U (en) | 2019-06-14 |
Family
ID=66782771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821413499.9U Active CN208987241U (en) | 2018-08-30 | 2018-08-30 | Expansible graphite piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208987241U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110402064A (en) * | 2019-06-21 | 2019-11-01 | Oppo广东移动通信有限公司 | Cooling fin and preparation method thereof, housing unit and electronic equipment |
-
2018
- 2018-08-30 CN CN201821413499.9U patent/CN208987241U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110402064A (en) * | 2019-06-21 | 2019-11-01 | Oppo广东移动通信有限公司 | Cooling fin and preparation method thereof, housing unit and electronic equipment |
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